SPF question

Lennart Sorensen lsorense-1wCw9BSqJbv44Nm34jS7GywD8/FfD2ys at public.gmane.org
Wed Oct 31 15:52:47 UTC 2007


On Wed, Oct 31, 2007 at 11:32:33AM -0400, Madison Kelly wrote:
>   So I ran into a problem with my Sender Policy Framework DNS entry. My 
> message was rejected because of my SPF entry in my DNS zone file because 
> I used my ISP's SMTP server.
> 
>   My question is, how do you setup an SPF entry when email users of 
> your domain are literally all over the world? It's impractical to 
> impossible to create a list of all the different MTAs my users may use, 
> and given that many ISPs now block port 110 to any server other than 
> their own SMTP server(s), asking non-techy users to use non-standard 
> ports when setting up their email program is also not feasible.
> 
>   In case it helps, this is my SPF for my alteeve.com domain:
> 
> alteeve.com. in txt "v=spf1 ip4:192.139.81.0/8 a mx mx:alteeve.com -all"
> 
>   Is there an alternate to SPF I should look at?

SPF probably makes great sense to large ISPs who can't imagine users
wanting to do email from anywhere else or run their own domains.  SPF
sucks for actual mail users.

I guess you could setup a webmail system for users of your domain to use
for all email, or you could in fact configure them to use a different
port when talking to your mail server and always send all mail through
that mail server for your domain.

Other than that, can't think of anything that would work.

I think SPF sucks. :)  If I can't mail someone because they insist on
SPF, well that's their loss as far as I am concerned.  It ranks up there
with sender verification systems.  The policy is: Do not make _me_ solve
_your_ spam problem.

--
Len Sorensen
--
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